package t4j.io;

import java.io.File;
import java.io.FilenameFilter;
import java.util.Arrays;
import java.util.regex.Pattern;

public class DirList2 {

	public static FilenameFilter filter(final String regex) {
		
		return new FilenameFilter() {

			private Pattern pattern = Pattern.compile(regex);

			@Override
			public boolean accept(File dir, String name) {

				return pattern.matcher(name).matches();
			}
		};
	}

	public static void main(String[] args) {
		File path = new File(".");

		String[] list;

		if(args.length == 0)
			list = path.list();
		else
			list = path.list(filter("^\\.\\w+"));
		
		Arrays.sort(list, String.CASE_INSENSITIVE_ORDER);//排序

		for (String dirItem : list)
			System.out.println(dirItem);
	}
}
